400ex front end

[adidazman15]

I did some research on those Diamond J kits and I would recommend against using them if you ride your bike hard or jump. Most who used them and ran their bike hard bent the mounts. I also read that moving the a arm mounting points further away from the centerline of your bike decreases stability. Many aftermarket frames, and the new Kawi's have moved the mounts for the a arms closer together.


This is all my opinion that I gathered from my research, I am not bashing the company or the product in anyway.

[Billy250X]

They say right on there sight that it was given extreme testing on a atv mx track and jumped higher than most people would and they had no problems.

[adidazman15]

I am just repeating what I found when I looked into them because I was interested in the idea. The stability issues were more a turn off for me then the durability.

[Billy250X]

What do you mean stability?They stability of the quad should be much greater if combined with a wider rear axle.

[adidazman15]

I'm not sure if this is allowed here but he is really well written piece on suspension geometry. He also explains how the kit affects stability.

ATV Riders Forum - Steering and Handling Discussion.

[TRX2fiveO]

That was a really informative write-up

[adidazman15]

hope it helps

[Billy250X]

Yeah it was.Now I understand what your saying.I think thats why my quad handles so crappy.I really need to buy my 250x a arms so I can build my new ones.

[adidazman15]

Wider is better isn't always the case, I wouldn't have believed it either until I read that write up. Even flipping your front rims for that extra inch is a bad idea according to this guys math. Are you currently running one of those kits?

[Billy250X]

Yeah but It's a copy version.I made it.All the same metal and that.But I plan on taking a stock set of a arms and adding to them with bracing inside of the existing tubes ofcourse.That way it's wider and the original pivot's are retained.